CN111853326A

CN111853326A - Alternating current low-power pilot-operated water inlet electromagnetic valve

Info

Publication number: CN111853326A
Application number: CN201910486593.XA
Authority: CN
Inventors: 王红标; 敖林; 徐飞; 区长钊
Original assignee: Jiangmen Tiande Electrical Appliance Co ltd
Current assignee: Jiangmen Hanyu Electrical Co ltd
Priority date: 2019-04-30
Filing date: 2019-06-05
Publication date: 2020-10-30
Anticipated expiration: 2039-06-05
Also published as: CN111853247B; CN111853326B; CN111853246B; CN111853246A; CN111853247A

Abstract

An alternating current low-power pilot type water inlet electromagnetic valve comprises a main valve, a pilot valve combined with the main valve and a coil sleeved on the periphery of a movable iron core driving a pilot valve plug; the coil comprises a framework, an enameled wire winding wound on the framework and a terminal used for being connected with a power supply; the rated voltage is non-low voltage; the apparent power of the winding is not more than 10 VA; the enameled wire is a copper enameled wire with the wire diameter not more than 0.1mm, or a copper-clad aluminum enameled wire with the wire diameter not more than 0.15mm, or an aluminum enameled wire with the wire diameter not more than 0.2 mm; and a loop of the power supply for supplying the winding current is connected with a voltage division device in series. This design significantly improves the process and cost of the conventional design.

Description

Alternating current low-power pilot-operated water inlet electromagnetic valve

Technical Field

The invention relates to an alternating current low-power pilot type water inlet electromagnetic valve, and IPC classification belongs to F16K 31/02.

Background

The alternating current low-power pilot-operated water inlet electromagnetic valve is widely used for controlling water supply of household appliances and similar appliances due to small volume and excellent performance, and the principle, the structure and the performance of the alternating current low-power pilot-operated water inlet electromagnetic valve can be detailed in related articles more than 30 years ago. As described in these articles, the conventional design of the valve has long been problematic in that the current supplied by the mains supply is very small, the required number of coil turns is thousands or even over ten thousands, and the wire diameter can be as small as 0.06mm, so that many process problems and the unit price of the enameled wire are high, and are always the primary factors affecting the quality and the cost, and no fundamental improvement is found.

With regard to terms and knowledge, except for those specified in the specification, see "IEC electric and electronic standard term dictionary" (1 st edition of Chinese Standard Press 1992), "Electrical apparatus manufacturing technology" (1 st edition of mechanical industry Press 1982), "mechanical engineering Manual" and "Motor engineering Manual" (1 st edition of mechanical industry Press 1978 and 2 nd edition 1997), and national Standard GB14536.9 "Special requirements (including mechanical requirements) for electric automatic Water valves for domestic and similar electric automatic controllers and" Water intake solenoid valves for automatic washing machines "(QB/T1291), which are national standards for light industry.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the alternating current low-power pilot type water inlet electromagnetic valve can remarkably improve the process and cost problems of the traditional design in the background art.

The technical scheme for solving the technical problems is as follows: an alternating current low-power pilot type water inlet electromagnetic valve comprises a main valve, a pilot valve combined with the main valve and a coil sleeved on the periphery of a movable iron core driving a pilot valve plug; the coil includes winding enameled wire winding on skeleton and the skeleton and is used for the terminal of being connected with the power, its characterized in that:

the rated voltage of the solenoid valve is a non-low voltage;

-the winding apparent power is not greater than 10 VA;

the enameled wire is a copper enameled wire with the wire diameter not more than 0.1mm, or a copper-clad aluminum enameled wire with the wire diameter not more than 0.15mm, or an aluminum enameled wire with the wire diameter not more than 0.2 mm;

and a loop of the power supply for supplying the winding current is connected with a voltage division device in series.

The technical effect of the technical scheme is as follows: the voltage divider divides the power voltage in the series circuit to reduce the voltage borne by the winding, the number of turns of the winding which generates equivalent electromagnetic force by the same magnetic circuit and the framework is reduced in a negative correlation manner, and the wire diameter of the enameled wire is increased in a positive correlation manner, so that the process and the cost of the traditional design in the background technology are obviously improved.

The voltage divider is preferably a one-way conductive element, so that the winding only bears half-wave voltage of an alternating current power supply, voltage division is simple and obvious, cost is low, and energy consumption is avoided during operation.

The voltage divider device is preferably designed with a unidirectional conductive element in series with an impedance element. The impedance element takes a proper value, so that the number of turns of the winding can be reduced, and the wire diameter of the enameled wire can be increased to the most satisfactory level of the process and the cost.

The impedance element may be a resistor, a capacitor, an inductor, a resistor and an inductor or a capacitor in series. The resistor is small in size and low in price, and the capacitor and the inductor do not consume energy when running.

The coil framework is further designed to be fixed with a power supply, a winding leading-out end and a terminal connected with the voltage divider, so that the product is convenient to manufacture, use and assemble. The basic design comprises:

the terminals for connecting with the power supply are a 1 st inserting piece and a 2 nd inserting piece which are positioned below the framework, the two inserting pieces are arranged in parallel, the length of the 1 st inserting piece is greater than that of the 2 nd inserting piece, and a 3 rd inserting piece which is in the same direction as the 2 nd inserting piece is also arranged behind the 2 nd inserting piece; the winding one is drawn forth the end and is connected with the 2 nd inserted sheet, and another is drawn forth the end and is connected with the 3 rd inserted sheet, and the 3 rd inserted sheet passes through the bleeder mechanism is connected with the 1 st inserted sheet.

The further design comprises the following steps:

the 1 st terminal is formed on the 2 nd inserting sheet, and the 2 nd terminal is formed on the 3 rd inserting sheet; one leading-out end of the winding is connected with the No. 2 inserting piece through the No. 1 terminal, and the other leading-out end of the winding is connected with the No. 3 inserting piece through the No. 2 terminal; the tail end of the 3 rd inserting sheet forms a 3 rd terminal, and the tail end of the 1 st inserting sheet forms a 4 th terminal; the voltage divider is connected with the 3 rd inserting piece through the 3 rd terminal and is connected with the 1 st inserting piece through the 4 th terminal.

One of the specific designs is as follows: the voltage dividing device is composed of 1 element, one end of which is connected with the 3 rd terminal and the other end is connected with the 4 th terminal.

The second design is as follows: the voltage divider comprises 2 elements, the coil further comprises a mounting plate, the mounting plate is vertically arranged above the tail ends of the 1 st inserting piece and the 3 rd inserting piece, and two mounting grooves for respectively accommodating the 2 elements are formed in the rear side of the mounting plate; one end of one of the 2 elements is connected with the 4 th terminal, one end of the two of the 2 elements is connected with the 3 rd terminal, and the other ends of the 2 elements are connected together.

The third design is as follows: the voltage divider is composed of 3 elements, on the basis of the second specific design, a boss is further formed on the rear side of the mounting plate, the other ends of the 2 elements are not connected, and the 3 rd element of the 3 elements is arranged on the boss and connected in series between the other ends of the 2 elements. The design is simple in connection, firm and durable.

The further design also comprises:

when the voltage divider is a unidirectional conductive element or the unidirectional conductive element is connected with the impedance element in series, the voltage divider further comprises a diode connected in parallel with the two leading-out ends of the winding, and the diode and the unidirectional conductive element have the same rectification direction to the leading-out ends of the winding and the winding 1. The diode releases the stored energy of the winding inductance when the one-way conductive element stops conducting, and can reduce the current pulsation, thereby improving the efficiency and reducing the electromagnetic interference and the vibration noise.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Drawings

FIG. 1 is a sectional view of a solenoid valve according to embodiments 1 and 4;

FIG. 2 is a schematic diagram of the coil structure of the solenoid valve according to embodiments 1 and 4;

FIG. 3 is a partial structural view of a coil of the solenoid valve according to embodiment 1;

FIG. 4 is a schematic diagram showing a coil structure of a solenoid valve according to embodiment 2;

FIG. 5 is a partial structural view of a coil of the solenoid valve according to embodiment 2;

FIG. 6 is a sectional view of a solenoid valve according to embodiment 2;

FIG. 7 is a rear view of the solenoid valve of embodiment 2;

FIG. 8 is a schematic view of a coil structure of a solenoid valve according to embodiment 3;

FIG. 9 is a sectional view of a solenoid valve according to embodiment 3;

fig. 10 is a partial structural view of a coil of the solenoid valve according to embodiment 4.

Detailed Description

The embodiment of the invention is improved on the basis of products similar to the products shown in the figures 2-21 in the principles and maintenance of a full-automatic washing machine (Fujian scientific and technical Press, 6 th month, 1 st edition in 2000), except that the directions of a water inlet and a water outlet are changed from vertical to parallel in order to adapt to the installation position of an appliance, the embodiment of the invention mainly aims to improve the quality cost problem in the background technology and improve the coil structure.

Example 1

As shown in fig. 1, the solenoid valve 200 of the present embodiment is mainly composed of a main valve, a pilot valve coupled to the main valve, and a coil 100 fitted around the outer circumference of a movable iron core 230 that drives a pilot valve plug 250. The main valve body 20 includes a water inlet 210 and a water outlet 220, and a return spring 240 is provided below the movable iron core 230 of the pilot valve. The movable core 230 and the return spring 240 are disposed in a cylindrical water stop sleeve 260 of the valve body 20, and a pilot valve plug 250 made of rubber is fitted to the top of the movable core 230.

The water blocking sleeve 260 is located in the cylindrical cavity of the bobbin 120 of the coil 100. The coil 100 has a plastic envelope 170 that encapsulates the bottom of the bobbin 120, the blades 130, the blades 140, the 3 rd blade 150, and the diode 160 as shown in fig. 2 and 3, and only the connection ends in front of the

blades

130 and 140 for power connection are exposed.

As shown in fig. 2 and 3, the coil 100 includes a bobbin 120 and an enameled wire winding 110 wound thereon, an insert sheet structure, and a diode 160 as a voltage dividing device. The winding 110 has 2 outgoing lines. The tab structure is located below the frame 120 and includes a tab 130 and a tab 140 for power connection.

The insert 130 and the insert 140 adopt the structure specified in GB/T17196, and can also be other non-standard common structures for special connection. The length of the insert 130 is greater than that of the insert 140, and the insert is disposed at two ends of the bottom of the frame 120 in parallel and supports the frame 120. The insert structure further comprises an insert 150 which is also arranged below the framework 120 and is arranged behind the insert 140 in the same direction as the insert.

The bottom of the insert 130 is provided with a terminal 131, the bottom of the insert 140 is provided with a terminal 141, and the bottom of the insert 150 is provided with a terminal 151 and a terminal 152. The terminal 131 extends downwards and bends from the bottom of the end of the insertion piece 130, the terminal 152 and the terminal 131 are symmetrically arranged at the bottom of the end of the insertion piece 150, the terminal 141 extends downwards and then inwards from the outer side surface of the insertion piece 140, and the terminal 151 extends downwards and then inwards from the outer side surface of the insertion piece 150.

One of the two lead lines of the winding 110 is connected to the terminal 141, the other is connected to the terminal 151, and 2 lead lines of the diode 160 are connected across the

terminals

152 and 131. The connection may be by soldering, or by other connection methods such as soldering, resistance welding, or caulking.

After the insertion sheet 130 and the insertion sheet 140 are connected with an alternating current power supply, current from one end of the alternating current power supply enters from the insertion sheet 130, reaches the insertion sheet 150 through the terminal 131, the diode 160 and the terminal 152, enters the winding 110 through the terminal 151 and one outgoing line of the winding 110, flows out from the other outgoing line of the winding 110 to the terminal 141, and reaches the other end of the alternating current power supply through the insertion sheet 140. The current generates a magnetic field in the winding 110 to drive the movable iron core 230 to compress the return spring 240 downward, so that the pilot valve plug 250 moves downward to open the flow hole of the pilot valve, the water source pressure drops to the main valve diaphragm in front of the balance hole to press the main valve diaphragm downward to open, and the water inlet 210 and the water outlet 220 are communicated, i.e., the electromagnetic valve is opened. After the power is cut off, the magnetic field generated by the winding 110 disappears, the return spring 240 jacks up the movable iron core 230 to push the pilot valve plug 250 to move upwards, the flow hole of the pilot valve is closed, the water source pressure passes through the balance hole to press the main valve diaphragm to return, so that the water inlet 210 and the water outlet 220 are in discontinuous flow, that is, the electromagnetic valve is closed.

In the current loop of the ac power source supplying power to the winding 110, the connection of the diode 160 can be adjusted to any series position of the loop. For example, the diode 160 across

terminals

131, 152 may be interchanged with the winding 110 across

terminals

151, 141, and the resulting voltage dividing effect of the diode 160 on the supply voltage by the winding 110 is unchanged. The polarity of the two ends of the alternating current power supply connected with the loop can be interchanged.

The present embodiment continues to use the rated voltage of 100V before improvement, use the series diode to divide the power voltage and change the original copper enameled wire into the aluminum enameled wire, and increase the wire diameter and decrease the number of turns, substantially maintain the apparent power of the primary winding and the required performance of QB/T1291, for example, as shown in the following table.

Wire rod

Wire diameter

Number of turns

Voltage of winding

Current of winding

Apparent power of winding

Cost of wire

Before improvement

Copper (Cu)

0.09mm

4000

100V

0.07A

7.0VA

0.65 yuan

After improvement

Aluminium

0.13mm

2000

54V

0.15A

8.1VA

0.29 yuan

The embodiment enables the wire diameter to be increased and the number of turns to be reduced, so that the process quality and cost problems in the background art are improved, and particularly, the wire diameter is increased to be available for an aluminum enameled wire (the minimum specification of the existing product is 0.12mm), so that aluminum is used for replacing copper, and the cost is remarkably reduced.

The diode 160 may also use a bidirectional thyristor controlled by the water inlet solenoid valve in the appliance to have the function of dividing the power supply voltage, and only the bidirectional thyristor needs to be controlled to be in one-way conduction when being connected.

The diode 160 can also be replaced by a single resistor, capacitor or inductor, and the element parameters can be adjusted through experiments to be equivalent to the effect of the series diode on the voltage division of the power supply. The resistor is small in size and low in price, but generates heat and consumes energy, and the capacitance and the inductance are opposite.

Example 2

As shown in fig. 4, 5, 6 and 7, compared with the solenoid valve 200 of embodiment 1, the solenoid valve 400 of the present embodiment mainly has a coil 300, compared with the coil 100 of embodiment 1, in order to accommodate a voltage divider composed of 2 resistors, the structure is adjusted:

the voltage divider diode 160 of example 1 is replaced by a resistor 361 and a resistor 362 in series;

the mounting plate 370 is vertically arranged above the ends of the insertion sheet 130 and the insertion sheet 150, mounting grooves for accommodating the resistor 361 and the resistor 362 are formed on the rear side of the mounting plate, namely, the side facing away from the winding 310, respectively, one end of the resistor 361 passes through a mounting hole at the bottom of the mounting groove where the resistor 361 is located to be connected with the terminal 152, one end of the resistor 362 passes through a mounting hole at the bottom of the mounting groove where the resistor 362 is located to be connected with the terminal 131, and the other end of the resistor 361 and the other end of the resistor 362 pass through mounting holes at the tops of the;

the number of turns and wire diameter of winding 310 are also different from winding 110 of embodiment 1 due to changes in the supply voltage and circuitry.

The parts in fig. 4, 5 and 6 with the same reference numerals as those in fig. 1, 2 and 3 have the same functions and are not described again.

In this embodiment, the rated voltage before improvement is 220V, two resistors are connected in series to divide the power voltage, and the wire diameter of the original copper enameled wire is increased and the number of turns is reduced, so as to substantially maintain the apparent power of the primary winding and the required performance of QB/T1291, as shown in the following table.

Wire rod

Wire diameter

Number of turns

Voltage of winding

Current of winding

Apparent power of winding

Cost of wire

Before improvement

Copper (Cu)

0.06mm

16000

220V

0.029A

6.4VA

0.69 yuan

After improvement

Copper (Cu)

0.08mm

9000

124V

0.051A

6.3VA

0.64 membered

The embodiment increases the wire diameter and reduces the number of turns, mainly improves the process quality in the background technology, and slightly reduces the cost due to the increase of the wire diameter of the enameled wire and the reduction of the unit price.

The resistance step-down does not generate electromagnetic interference and noise which are inevitable when the diode is used for step-down, but increases power consumption and heat. Two resistors are connected in series, so that elements with smaller power and volume can be selected, and the heat dissipation is better.

In addition, the mounting plate 370 may be designed to be a component previously formed before the

resistors

361 and 362 are mounted, or may be designed to be naturally formed by injection molding when the coils of the plastic package structure are integrally plastic-packaged after the

resistors

361 and 362 are placed in the coils.

Example 3

As shown in fig. 8 and 9, compared with the solenoid valve 400 of embodiment 2, the solenoid valve 600 of the present embodiment mainly has a coil 500, compared with the coil 300 of embodiment 2, in which diodes are connected in series between 2 resistors of a voltage divider, and the structure is adjusted:

at the top of the mounting plate 370, the other ends of the two original resistors respectively cross the mounting holes at the top of each mounting groove to be directly connected with each other, and are connected through the diode 563 instead.

The same reference numerals in fig. 8 and 9 as those in fig. 1 to 7 have the same functions, and are not described again.

In this embodiment, the rated voltage 127V before improvement is used, two resistors and diodes are connected in series to divide the power voltage, and the original copper enameled wire is changed into a copper-clad aluminum enameled wire, and the wire diameter is increased and the number of turns is reduced, so as to substantially maintain the apparent power of the original winding and the required performance of QB/T1291, as shown in the following table.

Wire rod

Wire diameter

Number of turns

Voltage of winding

Current of winding

Apparent power of winding

Cost of wire

Before improvement

Copper (Cu)

0.08mm

5100

127V

0.054A

6.9VA

0.67 yuan

After improvement

Copper clad aluminium

0.11mm

2850

72V

0.098A

7.1VA

0.44 yuan

The embodiment increases the wire diameter and reduces the number of turns, improves the process quality in the background technology, and particularly increases the wire diameter until a copper-clad aluminum enameled wire can be used (the minimum specification of the existing product is 0.1mm), so that aluminum is used for replacing copper, the weldability and the corrosion resistance of the copper enameled wire are maintained, and the cost is greatly reduced.

In addition, compared to embodiment 2, the resistance values of the 2

resistors

561 and 562 of the voltage dividing device can be reduced due to the series connection of the diodes, and power consumption and heat generation are reduced.

The advantage of this embodiment over embodiment 1 is that the number of turns of the winding can be reduced and the wire diameter of the enameled wire can be increased to the most satisfactory level of process and cost by making use of the adjustable resistance of the 2

resistors

561 and 562.

In addition, in addition to using the adjustable resistance values of the 2

resistors

561 and 562, as in embodiment 1, when the triac controlled by the water inlet solenoid valve in the appliance has the function of dividing the power voltage by the diode 160, the triac is controlled to be in one-way conduction when being turned on, and the purpose of adjusting the conduction angle can also be achieved, and the advantage of no power consumption and no heat generation is achieved.

Example 4

The solenoid valve of the present embodiment is further improved based on the solenoid valve 200 of embodiment 1, and compared with the solenoid valve 200 of embodiment 1, the improvement is only:

as shown in fig. 10, the

connection terminals

141 and 151, in addition to the two outgoing lines of the winding 110, are connected across the diode 960, and the conduction directions of the diode 960 and the diode 160 are shown by element numbers in the figure, i.e. their rectifying conduction directions are both directed to the terminal 150. Of course, the conduction directions of the two diodes may also be reversed simultaneously, i.e. the rectifying conduction direction of diode 960 is directed towards terminal 140 instead and the rectifying conduction direction of diode 160 is directed towards terminal 130 instead. Alternatively, diode 160 may be connected in series with appropriate resistors across

terminals

152 and 131 to meet the voltage division requirements of the power supply.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims

1. An alternating current low power pilot type water inlet solenoid valve comprises a main valve (20, 40), a pilot valve combined with the main valve and a coil (100, 300, 500) sleeved on the periphery of a movable iron core (230) driving a pilot valve plug (250); the coil comprises a framework (120), enameled wire windings (110, 310) wound on the framework and a terminal used for being connected with a power supply, and is characterized in that:

The rated voltage of the solenoid valve is a non-low voltage;

-the winding apparent power is not greater than 10 VA;

2. The solenoid valve according to claim 1, wherein said voltage divider means is a unidirectional conductive element or an impedance element or a unidirectional conductive element and an impedance element in series.

3. The solenoid valve according to claim 2, wherein the bobbin (120) is fixed with terminals to which a power supply, a winding lead-out terminal and the voltage dividing device are connected; the terminals for being connected with the power supply are a 1 st inserting piece (130) and a 2 nd inserting piece (140) which are positioned below the framework (120), the two inserting pieces are arranged in parallel, the length of the 1 st inserting piece (130) is greater than that of the 2 nd inserting piece (140), and a 3 rd inserting piece (150) which is in the same direction as the 2 nd inserting piece (140) is arranged behind the 2 nd inserting piece (140); a leading-out end of the winding (110) is connected with the 2 nd inserting piece (140), the other leading-out end is connected with the 3 rd inserting piece (150), and the 3 rd inserting piece (150) is connected with the 1 st inserting piece (130) through the voltage dividing device.

4. The solenoid valve according to claim 3, wherein the 2 nd insert (140) forms a 1 st terminal (141), and the 3 rd insert (150) forms a 2 nd terminal (151); one leading-out end of the winding (110) is connected with the 2 nd inserting piece (140) through the 1 st terminal (141), and the other leading-out end is connected with the 3 rd inserting piece (150) through the 2 nd terminal (151); the tail end of the 3 rd inserting piece (150) forms a 3 rd terminal (152), and the tail end of the 1 st inserting piece (130) forms a 4 th terminal (131); the voltage division device is connected with a 3 rd inserting piece (150) through a 3 rd terminal (152) and is connected with a 1 st inserting piece (130) through a 4 th terminal (131).

5. The solenoid valve according to claim 4, characterised in that said voltage dividing means consist of 1 element (160) connected at one end to the 3 rd terminal (152) and at the other end to the 4 th terminal (131).

6. The solenoid valve according to claim 4, wherein the voltage divider means is composed of 2 elements (361, 362), the coil (300) further comprises a mounting plate (370), the mounting plate (370) is vertically disposed above the ends of the 1 st insert (130) and the 3 rd insert (150), the rear side of the mounting plate (370) forms two mounting grooves for respectively accommodating the 2 elements (361, 362), one end of the 1(361) of the 2 elements is connected with the 4 th terminal (131), one end of the 2(362) of the 2 elements is connected with the 3 rd terminal (152), and the other ends of the 2 elements (161, 162) are connected together.

7. The solenoid valve of claim 4, wherein the voltage divider means is composed of 3 elements (561, 562,563), the coil (500) further comprises a mounting plate (370), the mounting plate (370) is vertically disposed above the ends of the 1 st insert (130) and the 3 rd insert (150), two mounting grooves for respectively accommodating the 2 elements (561, 562) are formed at the rear side of the mounting plate (370), one end of 1(561) of the 2 elements is connected to the 4 th terminal (131), one end of 2(562) of the 2 elements is connected to the 3 rd terminal (152), and the 3 rd element (563) is connected across the other ends of the 2 elements (561, 562).

8. The solenoid valve according to claim 1, characterized in that said voltage divider means is a unidirectional conducting element or a unidirectional conducting element in series with an impedance element, and further comprising a diode (960) connected in parallel to the two terminals of said winding (110, 310), and in that said diode (960) is rectified in the same direction as said unidirectional conducting element towards the same terminal 1 of said winding (110, 310).

9. The solenoid valve according to claim 8, wherein the bobbin (120) is fixed with terminals to which a power supply, a winding lead-out terminal and the voltage dividing device are connected; the terminals for being connected with the power supply are a 1 st inserting piece (130) and a 2 nd inserting piece (140) which are positioned below the framework (120), the two inserting pieces are arranged in parallel, the length of the 1 st inserting piece (130) is greater than that of the 2 nd inserting piece (140), and a 3 rd inserting piece (150) which is in the same direction as the 2 nd inserting piece (140) is arranged behind the 2 nd inserting piece (140); one leading-out terminal of the winding (110) and one pole of the diode (960) are connected with the 2 nd inserting piece (140), the other leading-out terminal of the winding (110) and the other pole of the diode (960) are connected with the 3 rd inserting piece (150), and the 3 rd inserting piece (150) is connected with the 1 st inserting piece (130) through the voltage dividing device.

10. The solenoid valve according to claim 9, wherein the 2 nd tab (140) forms a 1 st terminal (141) and the 3 rd tab (150) forms a 2 nd terminal (151); one leading-out end of the winding (110) and one pole of the diode (960) are connected with the 2 nd plug blade (140) through the 1 st terminal (141), and the other leading-out end of the winding (110) and the other pole of the diode (960) are connected with the 3 rd plug blade (150) through the 2 nd terminal (151); the tail end of the 3 rd inserting piece (150) forms a 3 rd terminal (152), and the tail end of the 1 st inserting piece (130) forms a 4 th terminal (131); the voltage division device is a diode (160) which is connected with the 3 rd inserting piece (150) through a 3 rd terminal (152) and is connected with the 1 st inserting piece (130) through a 4 th terminal (131).